Water in two major rivers in Pakistan's North West Frontier Province has started to recede after a fortnight of flooding, officials in the area say.

They say water levels in the swollen Kabul and Swat rivers are down by 30%. But the situation in southern Dera Ismail Khan district remains grave.

On Tuesday rescue teams evacuated more than 350 people to safer places in Dera Ismail Khan district.

Officials say people should not return home even if flood waters are receding.

We had alerted people about expected floods much earlier. They co-operated and moved to safer places

Ghulam Farooq, head of relief operations in NWFP

They are concerned that the start of the monsoon season may again lead to major rivers overflowing. The river Indus is still flowing at a high level.

The BBC's Haroon Rashid in Peshawar says there are no accurate figures relating to damage, but according to rough estimates, nearly 4,000 acres of agricultural land are under water affecting more than 10,000 people in 86 villages.